Single-Supply, High Speed,

Triple Op Amp with Charge Pump

ADA4858-3

Rev. 0

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FEATURES

Integrated charge pump

Supply range: 3 V to 5.5 V

Output range: −3.3 V to −1.8 V

50 mA maximum output current for external use at −3 V

High speed amplifiers

−3 dB bandwidth: 600 MHz

Slew rate: 600 V/μs

0.1 dB flatness: 85 MHz

0.1% settling time: 18 ns

Low power

Total quiescent current: 42 mA

Power-down feature

High input common-mode voltage range

−1.8 V to +3.8 V at +5 V supply

Current feedback architecture

Differential gain error: 0.01%

Differential phase error: 0.02°

Available in 16-lead LFCSP

APPLICATIONS

Professional video

Consumer video

Imaging

Active filters

CONNECTION DIAGRAM

NOTES

1. NC = NO CONNECT.

2. EXPOSED PAD, CONNECT TO GROUND.

ADA4858-3

1

2

C1_a

C1_b

CPO

3

4

11 –IN2

12 +IN2

CHARGE

PUMP

10 OUT2

9

56

7

8

16 15 14 13

PD

Figure 1.

GENERAL DESCRIPTION

The ADA4858-3 (triple) is a single-supply, high speed current

feedback amplifier with an integrated charge pump that eliminates

the need for negative supplies in order to output negative voltages

or output a 0 V level for video applications. The 600 MHz

−3 dB bandwidth and 600 V/μs slew rate make this amplifier

well suited for many high speed applications. In addition, its

0.1 dB flatness out to 85 MHz at G = 2, along with its differential

gain and phase errors of 0.01% and 0.02° into a 150 Ω load,

make it well suited for professional and consumer video

applications.

This triple operational amplifier is designed to operate on

supply voltages of 3.3 V to 5 V, using only 42 mA of total

quiescent current, including the charge pump. To further

reduce the power consumption, it is equipped with a power-

down feature that lowers the total supply current to as low as

2.5 mA when the amplifier is not being used. Even in power-

down mode, the charge pump can be used to power external

components. The maximum output current for external use is

50 mA at −3 V. The amplifier also has a wide input common-

mode voltage range that extends from 1.8 V below ground to

1.2 V below the positive rail at a 5 V supply.

The ADA4858-3 is available in a 16-lead LFCSP, and it is designed

to work over the extended industrial temperature range of

−40°C to +105°C.